Investigative Journalist for Maternal Memoire

I am a private individual looking for someone to investigate the life of my estranged mother. She is a mysterious figure - beautiful and charismatic in her early adulthood and completely untethered in her later years. She was abusive and abused. But what exactly created her...broke her...? What demented her bright potential so severely? Potential interviewees would be primarily located in New York and Georgia. She is deceased but survivors include her two estranged daughters, two ex husbands, her mother, sister, and brother, and perhaps friends.